Operations in an ETR and Mixed CTN
A Mixed Coordinated Timing Network (CTN) is a timing network that contains a collection of servers and has at least one Server Time Protocol (STP)-configured server stepping to timing signals provided by the Sysplex Timer. The STP-configured servers not stepping to a Sysplex Timer achieve synchronization by exchanging STP messages. The CTN ID contains a valid STP Network ID and an External Timer Reference (ETR) network ID.
This chapter discusses the following topics:

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